I'm thinking its not the head leaking. its more likely the side cover gasket. and in most cases the Oil sludge is so bad the oil return holes have plugged and the whole side cover & sometimes the valve cover are full after running all day. do yourself a favor and check the oil in the morning before you start it. it might be way over full. secondly smell the oil if its over full. if it smells like gas the you could have a fuel pump leaking into the crank case.

I'm thinking its not the head leaking. its more likely the side cover gasket. and in most cases the Oil sludge is so bad the oil return holes have plugged and the whole side cover & sometimes the valve cover are full after running all day. do yourself a favor and check the oil in the morning before you start it. it might be way over full. secondly smell the oil if its over full. if it smells like gas the you could have a fuel pump leaking into the crank case.